November 06 2008 / by Garry Golden
Category: Energy Year: 2020 Rating: 4 Hot
University of South Florida researchers have developed the tiniest solar cells ever built. The solar cells provide power to the team’s microeletromechanical system (MEMS) used to detect chemicals in lakes. The sensing device includes 20 tiny solar cells each about a quarter the size of a lowercase “o” in a standard 12-point font. [Sample MEMS image shown is NOT actual device]
Why is it important to the future of energy?
In the future we will need ways to power tiny sensors that detect changes in the world based on light, chemicals, temperature, noise, motion, et al. Micro power systems integrated into sensors are a foundation piece to ‘smart infrastructure’ used in applications ranging from energy, to security and environmental detection systems. Sensors embedded into everyday objects, as well as natural and built environments are likely to change the world in the next 50 years, as much as microprocessors changed our lives over the last 50 years.
The assembled device is also important for the future of ‘organic’ (carbon-based) solar cells that differ from traditional ‘silicon’ solar panels printed on glass substrates. Organic solar cells can be suspended in liquids and assembled using low cost ‘ink jet’ printers and, in theory, ‘printed’ on any surface. So we can imagine turning a rooftop or parking lots surface into a light collecting material.
What to watch:
An Energy Roadmap for Micro power and Sensors
This fabrication could be significant for micro (millionth of meter) and nanoscale (billionth of meter) energy systems powered by light. The technique might also accelerate development of organic solar cells. But there will be competition from other viable power sources, with better energy densities, including nanoscale designed batteries, fuel cells and piezoelectric devices that convert motion into electrical pulses.
Also via Eureka News Alert
The article “Fabrication of organic solar array for applications in microelectromechanical systems” by Xiaomei Jiang will be published by The Journal of Renewable and Sustainable Energy on November 6, 2008.